The two-soliton solution with a = 0.03. (a) Propagation of solitary wave |ψ|; (b) the shape of solution at t = 0, t = 23, and t = 60; (c) the residual of ; (d) the evolution of total conformal momentum GM; (e) the evolution of total conformal norm GN; (f) error of the dissipation rate of momentum r. |